It is too late to leave the lighthouse because, as they chase after Dinky, the lighthouse keeper leaves for his vacation in their boat. As he leaves, he warns them about the Bog Beast. They hope it is a joke but find out that the monster is real. All looks hopeless when the monster appears, a storm rolls in, a ship is in danger and the lighthouse is out. Dinky saves the ship by turning on the searchlight in time for the vessel to turn away from the rocks. Plus, he not only saves the girls from the creature but makes friends with it and gives it his bone.